package com.xy.netty.dome.life.cycle;

import com.xy.netty.dome.life.cycle.bound.handler.in.InboundHandlerOne;
import com.xy.netty.dome.life.cycle.bound.handler.in.InboundHandlerTwo;
import com.xy.netty.dome.life.cycle.bound.handler.out.OutboundHandlerOne;
import com.xy.netty.dome.life.cycle.bound.handler.out.OutboundHandlerTwo;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import lombok.extern.slf4j.Slf4j;

/**
 * @author niuniu
 */
@Slf4j
public class EchoServerLifeCycle {

    private final int port;

    public EchoServerLifeCycle(int port){
        this.port = port;
    }

    /**
     *
     * 启动流程
     */
    public void run() throws InterruptedException {
        //配置服务端线程组
        EventLoopGroup bossGroup = new NioEventLoopGroup();
        EventLoopGroup workGroup = new NioEventLoopGroup();
        try{
            ServerBootstrap serverBootstrap = new ServerBootstrap();
            serverBootstrap.group(bossGroup, workGroup)
                    .channel(NioServerSocketChannel.class)
                    .option(ChannelOption.SO_BACKLOG,1024)//存放已完成三次握手的请求的等待队列的最大长度;
                    .childOption(ChannelOption.TCP_NODELAY, true)//为了解决Nagle的算法问题，默认是false, 要求高实时性，有数据时马上发送，就将该选项设置为true关闭Nagle算法；如果要减少发送次数，就设置为false，会累积一定大小后再发送；
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            ch.pipeline().addLast(new OutboundHandlerOne());
                            ch.pipeline().addLast(new OutboundHandlerTwo());
                            ch.pipeline().addLast(new InboundHandlerOne());
                            ch.pipeline().addLast(new InboundHandlerTwo());
                        }
                    });
            //绑定端口，同步等待成功
            ChannelFuture channelFuture = serverBootstrap.bind(port).sync();

            if (channelFuture.isSuccess()){
                log.info("Echo服务器启动端口：{}",port);
            }
            //等待服务端监听端口关闭
            channelFuture.channel().closeFuture().sync();
        }finally {

            //优雅退出，释放线程池
            workGroup.shutdownGracefully();
            bossGroup.shutdownGracefully();
        }



    }


    public static void main(String [] args) throws InterruptedException {
        int port = 8080;
        if(args.length > 0){
            port = Integer.parseInt(args[0]);
        }

        new EchoServerLifeCycle(port).run();

    }

}
